Automatic compensating gear



Pha ten t e d Nov. 1, 1927.

omi tnivon sTARKEY, F ransiro, CALIFORNIA.

.AUTOMATIG ooMPENsATme GEAR,

Application filed May a,

invention relates to"automatic com- 1 pensatinggears'which are adapted tobe used 1 as timing gears in gas en'gines,'and forother purposes where silent gears are preferable. On October" 19th, 1926, U. S. Patent No.

1,604,105was granted-"to me on an application filed May 1st, 192 1, for a timing gear,

f maintain a tension between fthe automatic compensating gear and an engaging gear so that the back lash of the gears when running together, and noises incident thereto, are

eliminated. Other objects in my present invention are more simple construction so that a stronger ear than those of similar kinds used hereto 'ore, less working parts, and the portion of the wheel between the hub and th rim can be reduced to thinner dimensions than in the gear described in my patent hereinbefore referred to. will be hereinafter disclosed.

. These objects are accomplished by Other objects means of the device hereinafter described and illustrated on the accompanyingdrawing, .in which Fig. 1 is a View of one of thefaces of the automatic compensating gear with parts cut away to show the construction thereof. Fig. 2 is a sectional View of the gear along the line 22 in Fig.1. Fig. 3 is a view of the. wheel as viewed on the periphery.

. Referring to the drawings, my device comprises a disc 10 provided around its outer periphery with a plurality of gear teeth 11.

DisclO has a circular wheel center 12 concentric therewith which can be formed integral with disc 10, or rigidly attached thereto. The wheel center has the hub22 therein.

. Revolvably. mounted on the outer periphery adapted to register'when the ring is. assembled with disc 10 andhub 12. On theinner periphery of ring 13 are one or more recesses 15, and on the outer periphery of the'hub 12 are an equal number of recesses 16 which are adapted, when the ring 13 is assembled with hub 12, to register with the recesses 15 so that the combination of the two recesseslz") 1927. Serial No. 193,035. I

and 16 will form anelongated slot 56, which slot can be shortened or lengthened slightly by the oscillations of the ring 13 onhub 12'. 7

Within; each slot 56 is fitted a compression spring 17*adapted to normally hold'th'e' teeth I 1 1 in advance of the teeth 11, the' object b'ein'g that when the automatic compensating gear;

is enmeshed with another gear, the ring-13 is moved. back against the j compression spring 17 to a point where the teeth '11 and the teeth 14 will register so that-as the gears rotate together, 'spring17 will force the teeth '14 to have a contlnual pressure against'the teeth on the engaging gean I I l a A disc 27 of the same diameter as disc 10 is provided with a plurality of .teethi28' coinciding with the gear teeth 11. "Disc 27 v i is fitted on the top of hub 12 and ring 13 so the device can be manufactured at a low cost,

screws 29 as shown, or by any other suit-1: V

able manner. The holes in: thehu'b desig} nated 31, and the hole in disc 10 designated.

'32,'are adapted to receive the cap screws. It

will be noted that the recesses 15 and 16and the spring 17 can be made suffi'ciently smallso that the wheel between theportion of the hub having the wheel center opening 30 and; the rim of the wheel, the thickness of the wheel can be reduced as'sho'wn inFig; 2. The teeth on discs 10 and 27 are the driving teeth. By the pressure of the teeth on ring 13 against the teeth in the driven gear 1n the oppositedirection from the pressure 'of the drivingteeth, back lashofthe' teeth is eliminated and the tion silently.

Having described my invention, I claim:

gears enmeshed func- '1. An automatic; compensating gearconsisting of two discs'of equal diameters, each the assembled discs, a ring of equal out-.1 2 sidei diameter with the discs, having teeth on the outside periphery coinciding, with the.

teeth on the discs, rotatably mounted on'the circular member, recesses inflthe outside pe riphery of the circular member and in the inside periphery of the ring which jointly form elongated slots, resi'lient means within the slots" which permit the teeth on the ring to yieldingly register and be aligned with the 'teethon the discs. 7

2. An automatic compensating gear consisting of two discs of equal diameters, each disc having a pluralityof uniform teeth on the outside periphery, said discs being at tached together spaced distance apart, concentric andwith the teeth on the two discs ah-gned'a c rcular member of less diameter 7 than the discs attached to the discs concentric therewith and within the space between the assembled discs, a ring of equal outside diameter with the discs, having teeth on the outside periphery coinciding with the teeth on the discs rotatabiy mounted on the circular member. recesses in the outside periphery of the circular member and in the inside periphery ofthe ring which jointly iorm elongated slots, a compression spring Within' the slot one end of Which bears against the recess in the ring, and the other end of which bears against the olrcular meme her, said assembly permitting the ring to be 7 I CLARENCE L. sT-ARKEYQ 

